SMCJ33CE3/TR13 Equivalent & Substitute Parts Reference

Part Overview

The SMCJ33CE3/TR13 is a 33V Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for surface mount applications in DO-214AB (SMC) packaging. This bidirectional Zener-type TVS diode provides transient voltage protection with a 59V maximum clamping voltage and 25.2A peak pulse current capability. The part is actively produced and ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	33	V
Voltage - Breakdown (Min)	36.7	V
Voltage - Clamping (Max) @ Ipp	59	V
Current - Peak Pulse (10/1000µs)	25.2	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMCJ33CE3/TR13 are qualified based on the following critical parameters that determine functional equivalence:

Mandatory Matching Parameters:

Voltage - Reverse Standoff (Typ): 33V
Voltage - Breakdown (Min): 36.7V
Package / Case: DO-214AB or SMC
Mounting Type: Surface Mount
Type: Zener
Bidirectional Channels: 1
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 53.3V to 59V (lower clamping voltage provides enhanced protection margin)
Current - Peak Pulse (10/1000µs): 25.2A to 93.9A (higher current rating maintains or exceeds protection capability)
Power - Peak Pulse: 1500W to 5000W (higher power dissipation capability)
Operating Temperature Range: -65°C to 175°C (extended or equivalent range acceptable)

All identified substitute parts maintain the core 33V protection voltage specification while offering equivalent or superior electrical performance characteristics within the DO-214AB/SMC package form factor.

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Breakdown Min (V)	Voltage Clamp Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Temp Range (°C)	Package	RoHS
SMCJ33CE3/TR13	Microchip Technology	33	36.7	59	25.2	1500	-65 to 150	DO-214AB	ROHS3
5.0SMDJ33CA	HY Electronic (Cayman) Limited	33	36.7	53.3	93.9	5000	-65 to 150	DO-214AB	ROHS3
SMCJ33CA	MDD	33	36.7	53.3	28.2	1500	-50 to 150	DO-214AB	ROHS3
SMCJ33CA-13-F	Diodes Incorporated	33	36.7	53.3	28.1	1500	-55 to 150	DO-214AB	ROHS3
SMCJ33CA-TP	Micro Commercial Co	33	36.7	53.3	28.2	1500	-55 to 175	DO-214AB	ROHS3
SMDJ33CA	Alpha & Omega Semiconductor Inc.	33	36.7	53.3	56.3	3000	-55 to 150	DO-214AB	ROHS3
SMDJ33CA-T7	Littelfuse Inc.	33	36.7	53.3	56.3	3000	-65 to 150	DO-214AB	ROHS3
SMLJ33CA	Bourns Inc.	33	36.7	53.3	56.2	3000	-55 to 150	DO-214AB	ROHS3
SMLJ33CA-TP	Micro Commercial Co	33	36.7	53.3	56.2	3000	-55 to 175	DO-214AB	ROHS3

Engineering Selection Recommendations

All identified substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard surface mount assembly processes and storage conditions.

Primary Substitutes (Closest Electrical Match): SMCJ33CA-13-F (Diodes Incorporated) and SMCJ33CA-TP (Micro Commercial Co) provide equivalent peak pulse current (28.1A to 28.2A) and power dissipation (1500W) to the SMCJ33CE3/TR13, with clamping voltage reduced to 53.3V. These parts are suitable for direct replacement in applications where the lower clamping voltage provides acceptable protection margins.

Enhanced Performance Substitutes: SMDJ33CA-T7 (Littelfuse Inc.), SMDJ33CA (Alpha & Omega Semiconductor Inc.), SMLJ33CA (Bourns Inc.), and SMLJ33CA-TP (Micro Commercial Co) offer doubled peak pulse current (56.2A to 56.3A) and tripled power dissipation (3000W) while maintaining the 33V standoff voltage. These parts are suitable for applications requiring higher transient energy absorption capacity.

Maximum Performance Substitute: 5.0SMDJ33CA (HY Electronic) provides the highest peak pulse current (93.9A) and power dissipation (5000W) with identical standoff voltage specification, suitable for high-energy transient protection applications.

All substitute parts are actively produced with confirmed inventory availability and maintain the DO-214AB surface mount package specification.

Frequently Asked Questions (FAQ)

Q: Can SMCJ33CA-TP replace SMCJ33CE3/TR13 in my circuit?

A: Yes. Both parts share identical voltage specifications (33V standoff, 36.7V breakdown minimum), equivalent peak pulse current (28.2A vs 25.2A), and identical power dissipation (1500W). The clamping voltage is reduced from 59V to 53.3V, which provides a tighter protection window. Both are ROHS3 compliant with MSL 1 rating and use DO-214AB packaging.

Q: What is the difference between SMCJ33CA and SMDJ33CA?

A: Both parts maintain the 33V standoff voltage and 36.7V breakdown minimum. The primary differences are: SMDJ33CA provides 56.3A peak pulse current versus SMCJ33CA's 28.2A, and SMDJ33CA delivers 3000W peak pulse power versus SMCJ33CA's 1500W. SMDJ33CA is suitable for higher-energy transient events. Both use DO-214AB packaging and are ROHS3 compliant.

Q: Is the lower clamping voltage (53.3V) of substitute parts a concern?

A: Lower clamping voltage provides enhanced protection by limiting voltage rise to a lower threshold. For applications where the original 59V clamping specification was selected for specific circuit requirements, lower clamping voltage substitutes may alter circuit behavior. Verify that 53.3V clamping is acceptable for your protection scheme.

Q: Can I use SMLJ33CA-TP instead of SMCJ33CE3/TR13?

A: Yes, with consideration of higher current and power ratings. SMLJ33CA-TP provides 56.2A peak pulse current and 3000W power dissipation versus the original 25.2A and 1500W. The 33V standoff voltage and 36.7V breakdown minimum are identical. Operating temperature range extends to 175°C. This part is suitable for applications requiring higher transient energy absorption.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Most substitute parts are available in Tape & Reel (TR) packaging: SMCJ33CA-13-F, SMCJ33CA-TP, SMDJ33CA-T7, SMLJ33CA, and SMLJ33CA-TP. SMCJ33CA and SMDJ33CA packaging specifications do not explicitly indicate Tape & Reel format. Confirm packaging format with supplier documentation before procurement.

Q: What is the impact of extended temperature range on part selection?

A: SMCJ33CA-TP and SMLJ33CA-TP both extend the upper operating temperature to 175°C versus the original 150°C maximum. This extended range is beneficial for high-temperature applications but does not affect substitution compatibility for standard -65°C to 150°C operating environments. Lower temperature minimums (-65°C vs -50°C or -55°C) in the original part provide broader low-temperature coverage.

Q: Can I substitute based on peak pulse power rating alone?

A: No. Voltage specifications (standoff, breakdown, clamping) are the primary substitution criteria. Peak pulse power and current are secondary parameters that indicate energy absorption capacity. All qualified substitutes maintain the 33V standoff and 36.7V breakdown minimum specifications. Power and current ratings determine suitability for specific transient energy levels.

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